Name that thing! Things you might not know that have a name

There are some quizzes at the Merriam-Webster site that are very interesting. How do you name the part of the hammer used to take the spike out? There is a name for that.
Take the quizzes here: Name that thing; True or False and Vocabulary quiz are the three types of questions.
Enjoy!
Answer of the images above: Corinthian Column; Bugle; Tasmanian Devil and Cumulus Cloud.